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Type: Posts; User: Smart \$

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1. ## Thread: Article 210.19(A)(3) Exception 1

by Smart \$
Replies
22\$\$
Views
210

### The exception says where smaller than the branch...

The exception says where smaller than the branch circuit conductors. It does not say anything about ampacity in this regard. However this infers the equipment cannot have a load rating less than...
2. ## Thread: Pulling of Cable

by Smart \$
Replies
10\$\$
Views
265

### Figure eight is essentially a condensed a zig zag...

Figure eight is essentially a condensed a zig zag but the weight of the top loops increase the potential to exceed the minimum bending radius if the pile is not flipped...and even when flipped the...

by Smart \$
Replies
41\$\$
Views
735

4. ## Thread: Article 210.19(A)(3) Exception 1

by Smart \$
Replies
22\$\$
Views
210

### My take is the conductors between JB's cannot be...

My take is the conductors between JB's cannot be tap conductors. My reasoning is the last JB's are required to be secured. The "not be longer than necessary for servicing" stipulation would require...

by Smart \$
Replies
41\$\$
Views
735

6. ## Thread: Transformer Fusing - 3 Phase

by Smart \$
Replies
4\$\$
Views
96

### Your calculation is correct for determining rated...

Your calculation is correct for determining rated current. Maximum OCPD rating will require additional calculation, which is simply multiplying your resulting values by the permitted percentages for...
7. ## Thread: S.C. & G.F. for an a/c unit and a motor

by Smart \$
Replies
14\$\$
Views
162

### Technically, without separate A/C unit SC/GFPD...

Technically, without separate A/C unit SC/GFPD after the motor tap, it is a branch circuit, not a feeder. The motor SC/GFPD is considered supplementary OCPD underArticle 240. The appropriate...
8. ## Thread: So much for the super beast.

by Smart \$
Replies
41\$\$
Views
735

### Not certain if it has been mentioned because I...

Not certain if it has been mentioned because I did not read all the posts... but I believe a common cause of furnace board failure is power line surge.
9. ## Thread: S.C. & G.F. for an a/c unit and a motor

by Smart \$
Replies
14\$\$
Views
162

### The supply conductors being a feeder has not yet...

The supply conductors being a feeder has not yet been established. Assuming the motor "tap" is after the A/C unit's SC/GFPD and no additional SC/GFPD for the motor, it would be considered a branch...
10. ## Thread: Correct way to run neutral conductor.

by Smart \$
Replies
12\$\$
Views
233

### Not sure whether you saw it before you posted,...

[/QUOTE]
Not sure whether you saw it before you posted, but he said using MC Lite aluminum. That qualifies as a nonmagnetic sheath wiring method under 330.3(B)(3). However, unless a double MC...
11. ## Thread: ASHRAE Receptacle Control

by Smart \$
Replies
12\$\$
Views
359

### Shouldn't actually screw up the desktop.. as in...

Shouldn't actually screw up the desktop.. as in corrupt the operating system. However, modern operating systems communicate with displays to obtain resolutions, color rendering capabilities, and...
12. ## Thread: Max recep #on 120 v circuit?

by Smart \$
Replies
6\$\$
Views
298

### And I agree!!! I just wanted elaborate on the...

And I agree!!!

I just wanted elaborate on the points of contention in the debate.
13. ## Thread: Max recep #on 120 v circuit?

by Smart \$
Replies
6\$\$
Views
298

### The point of contention to that view is 210.11,...

The point of contention to that view is 210.11, which specifically refers to 220.10, which in turn specifically refers to 220.14. The debate then centers around 220.14(J) because most receptacles in...
14. ## Thread: transformer and panel ques?

by Smart \$
Replies
6\$\$
Views
192

### Before jumping the gun on proper grounding, the...

Before jumping the gun on proper grounding, the first clarification needed is whether this is a service transformer, or non-separately-derived or separately-derived system...??? Given the primary...
15. ## Thread: Max recep #on 120 v circuit?

by Smart \$
Replies
6\$\$
Views
298

### Been debated with no absolute resolution... but...

Been debated with no absolute resolution... but the majority go with 120V times 20A divided by 180VA, yielding a maximum of 13 per circuit. You go with the full 20A noncontinuous in the...
16. ## Thread: NI Rating for Class 1 Div 2 E/P Transducer

by Smart \$
Replies
6\$\$
Views
188

### If the E/P is C1D1 IS, you can install it IS in...

If the E/P is C1D1 IS, you can install it IS in C1D2.

Did you look at IS control drawing? It may have optional C1D2 NI installation on it.
17. ## Thread: MCA to kW

by Smart \$
Replies
12\$\$
Views
264

### Key words: shall be permitted It doesn't say...

Key words: shall be permitted

It doesn't say we must use nominal system voltage for the purpose of load calculations.
18. ## Thread: MCA to kW

by Smart \$
Replies
12\$\$
Views
264

### One way to look at it perhaps, is the MCA...

One way to look at it perhaps, is the MCA includes an extra 25% for the largest motor of the unit. If the motor/motor compressor is not the largest supplied by the panel, then I'd feel safe...
19. ## Thread: OCPD Brain Freeze!

by Smart \$
Replies
27\$\$
Views
526

### As noted by GD, two wire connection. Needs...

As noted by GD, two wire connection.

Needs one side grounded for GF reference.
20. ## Thread: OCPD Brain Freeze!

by Smart \$
Replies
27\$\$
Views
526

### I was just quoting 132V value posted by GD. ...

I was just quoting 132V value posted by GD. Didn't check accuracy... :happysad:

BTW & FWIW, the 240V is the standard... 139V would be the rounded value.

by Smart \$
Replies
4\$\$
Views
197

### Not certain how well welders run off a solar...

Not certain how well welders run off a solar powered inverter, but you're not far off regarding the numbers. Only thing missing is that the welder is not 100% efficient. That is, it will draw more...
22. ## Thread: OCPD Brain Freeze!

by Smart \$
Replies
27\$\$
Views
526

### That'd amount to 416Y/240, which is why I...

That'd amount to 416Y/240, which is why I suggested it in the first place.
23. ## Thread: OCPD Brain Freeze!

by Smart \$
Replies
27\$\$
Views
526

### I understand. So the 416:480 transformer is...

I understand.

So the 416:480 transformer is not a problem, even though uncommon?

And what about using three 240:480 1Ø xfmrs?
24. ## Thread: Apt Minimum Size Feeder

by Smart \$
Replies
36\$\$
Views
710

### Article 230 concerns services, not feeders.

Article 230 concerns services, not feeders.
25. ## Thread: OCPD Brain Freeze!

by Smart \$
Replies
27\$\$
Views
526

### 416:480 doesn't seem like it'd be a very commonly...

416:480 doesn't seem like it'd be a very commonly available transformer. Haven't researched though...

What about three (3) 240:480 with one line on low side grounded and all three high sides...
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